Colored prepared roofing



Mafch 12, 1935. R s, DENMNG 1,994,066

COLORED PREPARED RooFINs Filed Aug. 4, 1930 Event-079 ]Daa/ 5. ewu'lg Patented Mar. 12, 1935 UNITI-:D vSTATES lMineur OFFICE COLORED PREPARED ROOFING Pauls. Denning, Joliet, Ill., asslgnor to Frederic E. Schundler, Joliet, Ill.

Application August 4, 1930, Serial No. 472,958

' 1 claim. (Cl. 91-68) The objects of the invention are to provide a applied to the rooiing without reference to the brilliant coat of color upon the prepared roong; color which will later be produced. to reduce the amount of coloring material Figs. 1 and 1A illustrate the manufacture of hitherto necessary; to make possible a more iiexthis roofing. A felt sheet is wound oi! of the 5 ible manufacturing procedure; and to reduce Vroll 11 into the saturator 12 where the sheet is the cost of coloring prepared roong. l properly waterproofed. It is drawn from the These and other objects of the invention wil saturator by the squeeze and feed rolls 13 and become apparent as the description proceeds into the coater where a roll-14, revolving in a and the specication is read with reference to tank of melted asphalt 15, spreads a coat\ of l0 the drawing in which asphalt upon the under surface of the felt. 'I'he l0 y Figs. 1 andi-"TA are a diagrammatic showroll 16 spreads a like coating .upon the upper ing representative of a continuous process for surface. The asphalt forming the upper coating making colored prepared roofing. is fed to the sheet and the roll through the It has long been customary to surface prespout 17. From the coater, the hot sheeting is 15y pared roofing by applying to the coated felt run to the mineral coaterwherea layer of l5 base some adhesive agent such as asphalt and powdered material, such as talc or sand, is embedding in the asphalt granules of V crushed spread upon the under surface and the granules rock. Since. brilliant colors on buildings are of crushed slate or other rock are spread out more and more used, there is a distinct demand upon and' rolled into the upper surface. 'I'he that the` colors of prepared rooting should be material for coating the back of the sheet is 20 brillianti Natural rocks which are available do held in the pan. 18 and. the granules are fed not have sutllciently brilliant color, consequently through the spout 19. The roll 21 holds the it has become customary to coat the granules felt in proper position during this operation. with powdered mineral colors and' bond the` From the mineral coater the felt sheet passes .25 color to the granule by some form of cement. between the pressure rolls 22 and 23 and then 'I'his process is open to the objection that it over the water-cooled cooling rolls 24-24. is frequently necessary to heat the cement in The diagram indicates three water-cooled rolls order to set it. The brilliantly colored mineral only. Many rolls, however, are often used. powders are often the hydrated form of the me- When the sheet has been sumciently chilled by tallic molecule which heat partially destroys. the -cooling rolls, it passes under a transverse 30 Further, the entire surface of the granule .must pipe 25 supplied with 'a series of spray heads be coated and, since a relatively small portion is 26. The pipe is connected through the conexposed and the rest embedded in asphalt, a' duit 27 to a lacquer reservoir 28 and the latter considerable proportion of the color is actually receives energy from a compressed air line 29.

lost. This is serious because of the cost for it When it is desired to apply two colors to the -35 must be rememberedthat the brilliant powdered 1'0011118, a SeCODd tranSVeISe pipe 31, Supplied, pigments are usually salts of relativelyexpenwith spray' nozzles 32 connected by conduit 33 sive heavy metals. to the pressure tank 34, is used. In such'a case,

The other objection to the process of emthe spray heads 32 are staggered with reference 40 bedding colored granules is that the' color. is to the spray vheads 26` and the application of 40 toned down by the background of the asphalt pressure through the air pipes 29 and 35 may since small areas -of black show, and it is not be alternated by an automatic valve. Ify more possible to produce as brilliant a color. as could than two colors are wanted, the .apparatus is be desired. -I Vagain duplicated'.

The method herein mustrated discloses a The sprayapparatus is covered by a hood 36 .4.5

means of coloring prepared. rooilng which reconnected to a suitable exhaust fan, not shown, quires much less pigment than when the granso that the vapors from the solvents may be reules are all individually coated. It also covers moved. The hood may extend for a considerable up the black asphalt areas so that a very brildistance sothat practically all of the vapor reliant rooting isv produced. Further, since a leased by the drying of the lacquer may be 50 color coating is applied directly to the sheet exhausted through the fan. The roofing then after most of the operations in manufacture runs through a looper 37 into the packaging roll have been completed, it simplifies the manu- 38 where packages suitable for use in the trade facturing procedure. A standard grade of relaare made up. 4 1 tively inexpensive crushed rock may always be In the application oi lacquer to prepared roof- ,55

ing care must be taken that the lacquer solvent must not be a solvent for the asphalt, otherwise much of the protective coat of asphalt would be ruined. Some of the asphalt would be dissolved and its intense black pigment would spread throughout the whole color coat.

I have discovered that a suitable solvent which does not aiect the asphalt is denatured alcohol,

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providing that the denaturant does not have petroleum derivatives therein. A suitable bonding agent is rosin.

A typical mixture which will produce a brilliant colox` is as follows:

Twenty per cent rosin is dissolved in commercial alcohol and the mixture is tinted to the desired degree by the addition of chromium oxide and Iron Green. 'I'his will produce a satisfactory green lacquer. Reds may be secured by the addition of high grade haematite and, in fact, `any of the common mineral paint pigments may be used.

The advantages of the process are that no lmore of the expensive pigment is required than will coat the surface of the rooting. 'Ihe asphalt itself, as well as the granules, is also colored Lammev i which makes the rooting very brilliant. The coating is durable and the lacquer coat has no deleterious effect whatever upon the protective asphalt coats.

I do not limit myself to rosin and alcohol for it is obvious that many articial or natural resins could be usedl/ It is required only that the resin be reasonably waterproof and soluble in a substance which cannot dissolve the asphalts in the coating. A

A great flexibility and output may be realized since the roofing may be made any color desired merely by changing the colors in the lacquer tanks. A

I claim as my invention:

A prepared roofing comprising a foundation felt impregnated with an asphaltic` compound and coated with a bituminous material and having a layer of granules embedded on one surface thereof, and a thin adherent coating over an entire surface of the roong including the exposed surface only of the granules, said coating consisting only of color pigment and a resin.

PAUL s. DNNING. 

